Nobodies responding because of all the conspiracy theories out about Sandy Hook there that is one of the dumber more blatantly whacked ones out there.

It's already been debunked by multiple sources.

The footage is from two days later St. Rose of Lima School when the bomb threat was called in and they had to evacuate the church and the school during services. The conspiracy nuts just did some of their usual editing by leaving out the rest of the news broadcast that would explain exactly what you're looking at.